Excessively high powder content
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Our plant has been experiencing a high level of coke powder recently; the proportion of mixed coke powder has reached 13-14%. Please analyze what might be causing this.
1. There is an excessive amount of low-cohesion coal used as a blending component. 2. The furnace temperature is too low. This is just my personal opinion; I hope other users can share their thoughts as well
It is likely due to insufficient thickness and cohesion of the coal blending gel layer, as well as poor thermal regulation in the coke oven and issues related to undercooked coke.
1. The G value and Y value of the blending coal are relatively low； 2. The furnace temperature is not appropriate; either the coke is overcooked or undercooked, which leads to an increase in rubber powder ； 3. If the coke has decent resistance to compression strength but low wear resistance, check whether too much lean coal was used in its formulation ； 4. The vibrating screen (or other type of screen) on the coke screening building is clogged. This is what I can think of; maybe it’s not comprehensive enough.